Philips – The Behaviour of a Droplet of Polymer Solution in an Ink-jet Printer

Light-emitting polymer displays are a new, interesting flat display principle. The active material in the display is a  very thin semiconducting polymer layer of order 100 nanometer. To obtain these thin layers a small concentration of the polymer is dissolved in a suitable solvent. Different colours can be obtained with different polymers. To make aView problem details

Nederlands Forensisch Instituut – Probability Model for Marks and Prints

From the Nederlands Forensisch Instituut there are two related problems, one about so-called tool marks and the other about shoeprints. Toolmarks appear when at a burglary a tool (a screwdriver or crowbar) is being used to break a door or window open. This tool leaves a mark: in the doorpost for example a mark orView problem details

KLM – Performance Forecast of a Flight Schedule

In search of a quick method to forecast the quality of a flight schedule Situation KLM flies to over 150 destinations with 97 aircraft. Four times a year, a new flight schedule is developed. Though the operational feasibility is taken into account up to a certain degree during the development process, the aim at thatView problem details

Het Nationaal Beiaard Museum – Hanging a Carillon in a Broek-system

A carillon consists of approximately 20 up to 45 bells. These bells hang in an open lantern-tower (like the Munttoren in Amsterdam) or inside a tower under the roof. A carillon is played using a keyboard that is generally located one story below the bells. A wire connects each clapper to the keyboard. The oldestView problem details

RIVO – Problems Surrounding the Expanding Pacific Oyster in the Eastern Scheldt

History of oysters Flat oysters have been commercially cultured in the Eastern Scheldt Estuary (The Netherlands) since 1875. After the severe winter of 1962/1963, which caused high mortality, the stock was diminished. Searching for alternatives, Dutch oyster farmers introduced the Pacific oyster to the Eastern Scheldt in 1964. The Pacific oyster is native to Japan.View problem details